Chambered Round Mufflers – Exclusive louvered core creates a sweet “Street Rod” deep tone that is not overly aggressive. On a 1-10, 10 being the loudest, these mufflers are an 8. Mufflers are seized so that they can be reversed for an even more aggressive sound. Can be welded or clamped in place. The best tube style mufflers available! Custom lengths available- we can produce these up to 60” long! (Inlet/Outlet sized by inside diameter.)